1 substr(`hello', 0)
2 substr(`hello', 1)
3 substr(`hello', 4)
dnl this is interesting, bsd version has different behaviour this!
4 substr(`hello', 5)
5 substr(`hello', 6)
6 substr(`hello', 7)
7 substr(`hello', 0, 0)
8 substr(`hello', 0, 1)
9 substr(`hello', 0, 5)
10 substr(`hello', 0, 6)
11 substr(`hello', 2, 2)
12 substr(`hello', 3, 3)
13 substr(`hello', 5, 1)
14 substr(`hello', 6, 1)